Device for protecting carbon filaments for incandescent electric lamps.



' PATENTED AUG. 30, 1904. A. W. W.-MILLER 6: G. P. MODONNELL. DEVICE FOR PROTECTING CARBON PILAMENTS FOR INCA'NDESCENT ELECTRIC LAMPS. APPLICATION FILED JULY 3 1003 NO MODEL.

"UNITED STATES Patented. August 30, 1.90;. PATENT OFErc ALBERT W. W. MILLER, OF SOUTH ORANGE, NEW JERSEY, AND GEORGE P. MoDONNELL, OF sr. LOUIS, MISSOURI, ASSIGNORS TO AMERICAN ELECTRIC COMPANY, OF EAST ORANGE, NEW JERSEY, A CORPORATION OF NEW J ERSEY.-

DEVICE FOR PROTECTING CARBON EILAMENTS FOR INCANDESCENT ELECTRIC LAMPS.

SPECIFICATION forming part of Letters Patent No. 768,614, dated August 30, 1904. Application filed July 3, 1903. Serial No. 164,117. (No model.)

To all whom, it may concern.-

Be it known that we, ALBERT W. W. MIL- LER, residing at South Orange, New Jersey, and GEORGE P. MCDONNELL, residing at St. Louis, Missouri, citizens of theUnited States, have jointly invented a certain new and useful Improvement in Devices for Protecting Carbon Filaments for Incandescent Electric Lamps, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a perspective view of our improved device with one of the trays elevated, and Fig. 2 is a vertical sectional view showing several trays in position. This invention relates to a new and useful improvement in devices for protecting carbon filaments for incandescent electric lamps, the object being to construct a device of the character described which is simple, cheap, and economical of space and one which possesses the advantages of not only preserving the filaments against breakage, but enables the filaments to 'be stored in trays, each tray containing a certain number, which enables the number of filaments on hand to be quickly and readily determined.

Heretofore carbon filaments have usually been handled by arranging them on a rod or wire, a certain number being spaced apart such, for instance, as a dozen-by a washer. This method of handling the filaments is objectionable not only because of the broken filaments resulting, but for the further reason that the filaments become tangled, thus consuming time in their separation. By our improved device each filament is separate from the others, and as the superimposed trays contain a given number of filaments itisobvious that the filaments are not only better protected, but are more accessible to ready handling, but in addition the exact number With these objects in view the invention consists in the construction, arrangement, and comblnatlon of the several parts, all as here- 7 inafter described, and afterward pointed out in the claim} In the drawings, 1 indicates a frame, preferably composed of side and end pieces riv-- eted together. Rising from this base-frame are standards 2, their outer ends being preferably curved outwardly to center and guide the trays when they are introduced intothe frame. There may be one or more of these standards extending upwardly from each of the four sides of the frame, and these standards may be located at any point on the sides of the frame and be of any desired shape in cross-section. v 3 indicates trays, which are 1 preferably made upof marginal flanges or a frame-piece 4: with a bottom 5. The bottom supports the filaments 6, arranged in the tray, andthe marginal flanges provide a suitable depth for the filaments, so that the bottom of the next tray above will not come into such close contact with the filaments as to cause breakage thereof. r

It will be observed that the standards 2 are provided near their lower ends to form seats, on which the frame rests. These seats are in the form of offsets (designated by the reference-numeral f2)- and serve to efiiciently supfilaments are preferably so disposed that each tray will contain such predetermined number. These trays are then arranged in the holdingframe one above the other, with the result that the number of trays in the frame multiplied by the number of filaments in each tray will show the number of filaments contained in the device. These trays when assembled in the frame are in such relation as to provide an excellent means for protecting the filaments thereon from dust and moisture and facilitate the handling thereof.

We are aware that minor changes in the construction. arrangement, and combination of the several parts of our device can be made and substituted for those herein shown and described without in the least departing from the nature and principle of our invention.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is

A tray for carbon filaments comprising a skeleton frame, upstanding tray-holding standards provided with free outwardly-bent terminals, inbent oflsets carried by the standards and secured to the frame, and depending legs fixed to the ofisets; substantially as described.

In testimony whereof we hereunto allix our signatures. in the presence of two witnesses, this 30th day of June, 1903.

ALBERT \V. \V. MILLER. (lrEOhHE P. MGDONNELL.

\Vi tn csses:

Gricone n BAKuwnLL. FREDERICK H. (irimas. 

